Metals and Their Compounds

In the industrial extraction of sodium metal using the Downs cell, calcium chloride ($\text{CaCl}_2$) is added to molten sodium chloride ($\text{NaCl}$) primarily to:

When a few drops of aqueous sodium hydroxide are added to a solution of aluminium chloride, a white gelatinous precipitate forms. Upon adding excess sodium hydroxide, the precipitate dissolves to produce a clear, colorless solution. Which chemical species is present in the final clear solution?

Match each aluminium alloy or extraction reagent on the left with its correct composition, primary industrial application, or function on the right.

During the industrial extraction of iron from hematite ($\text{Fe}_2\text{O}_3$) in the blast furnace, which chemical species acts as the primary reducing agent responsible for converting the iron ore to iron in the upper region of the furnace?

During the industrial extraction of iron in a blast furnace, hematite ($Fe_2O_3$) is reduced to iron in the upper region of the furnace. Which chemical species acts as the primary reducing agent in this upper zone?

Match each chemical substance or process associated with iron extraction and rust prevention on the left with its corresponding chemical role or function on the right.

Match each transition metal or transition metal compound listed on the left with its corresponding industrial catalytic process on the right.

Copper is a transition metal with an atomic number of $29$. What is the ground-state electronic configuration of the copper(II) ion ($Cu^{2+}$) present in copper compounds such as copper(II) tetraoxosulfate(VI)?

Match each metallic alloy listed in Column A with its corresponding elemental composition and primary application in Column B.

During the industrial extraction of iron in the blast furnace, limestone ($\text{CaCO}_3$) is decomposed by heat to form calcium oxide ($\text{CaO}$), which then reacts with silica ($\text{SiO}_2$) impurities present in the ore. Which of the following chemical formulas represents the molten slag produced from this reaction?

During the electrolytic refining of copper, a steady current of $5.0\text{ A}$ is passed through an aqueous copper(II) tetraoxosulfate(VI) ($CuSO_4$) solution for $965\text{ seconds}$. What mass of copper, in grams, is deposited at the cathode? (Faraday's constant $F = 96,500\text{ C mol}^{-1}$; Molar mass of $Cu = 64\text{ g mol}^{-1}$)

What is the ground-state electronic configuration of the iron(III) ion, $Fe^{3+}$? (Atomic number of $Fe = 26$)

Match each aluminium extraction component, compound, or alloy listed on the left with its accurate chemical role, structural behavior, or application on the right.

Match each transition metal complex species on the left with its corresponding IUPAC name and oxidation state of the central metal ion on the right.

When copper metal turnings are heated with concentrated tetraoxosulfate(VI) acid ($H_2SO_4$), a dense gas is evolved alongside the formation of copper(II) tetraoxosulfate(VI) ($CuSO_4$) and water ($H_2O$). Which of the following correctly identifies the gaseous product evolved and the specific role of concentrated $H_2SO_4$ in this chemical reaction?

Arrange the following sequential industrial steps of the Bayer process used in refining bauxite ore into pure alumina (aluminium oxide) in the correct chronological order from first to last.

Soft solder is an alloy commonly used in electrical wiring and plumbing to join metal components. Which pair of metals constitutes soft solder, and what structural mechanism explains why solder is harder than its pure constituent metals?

Duralumin, an alloy primarily composed of aluminium along with copper, magnesium, and manganese, exhibits higher tensile strength than pure aluminium because the presence of atoms of different sizes distorts the metallic lattice and hinders the slipping of crystal planes.

Match each chemical phenomenon or process involving iron and its compounds listed on the left with its corresponding chemical principle or characteristic observation on the right.

In the industrial extraction of iron from haematite ($Fe_2O_3$) in a blast furnace, which chemical species acts as the primary reducing agent for reducing iron(III) oxide in the upper zone of the furnace?